The Effect of Mewis Duct Energy Saving Device to Propeller Performance

Abstract Installation of ESD (Energy Saving Device) can improve ship propulsion performance. Mewis Duct is one type multi-component device that combines nozzle and fin into the nozzle. The structure minimize losses due to small at ship's stern rotational or loss thrust in slipstreams area. reduce power by about 3-8% increase on propeller 2-5%. This study aims performance INSEAN e779a using Duct. modified ducts are number fins four, five, six asymmetrical four symmetrical computational fluid dynamics (CFD) approach. CFD code based RANS (Reynolds - Averaged Navier Stokes) equation with turbulent model k-ε. found installing duct as a increased 3-5% torque 3-4%.